physics

Centre for Solid State Physics, University of the Punjab, Quaid-e-Azam Campus, Lahore

Abstract:

A new technique for surface modification has been developed that incorporates plasma spraying coupled with CO2 laser irradiation simultaneously. The microstructural defects associated with plasma spraying have been significantly controlled with the laser beam irradiation. The tribological properties of the spraying synthesised films were evaluated by a sliding test under lubrication with oil. Results exhibit that it is quite possible to produce high performance tribo-material possessing better adhesiveness and low percentage of micro-porosity. Analytical results by XRD suggest that a metastable state is formed by laser irradiation during spraying process, which is closely related to anti-wear and low friction mechanisms.

New Lecture Theater, University of Engineering and Technology (UET), Lahore

Abstract:

PART I: The need for fuel cells and their applications: PART II: The varieties and types of fuel cells: PART III: The electrochemistry of fuel cells: POST-SCRIPT OF PART I: history of fuel cells why the need arose for fuel cells benefits of fuel cells over conventional energy sources like efficiency, cleanliness, etc. problems associated with fuel cells like cost, opposition of conservative IC manufacturists Applications: automobiles, GEMINI and other space missions, alcohol breath tester.

Resource People:

Presenter

Mudassir Naveed

Electrical Engineering Department, University of Engineering and Technology (UET), Lahore

New Lecture Theater, University of Engineering and Technology (UET), Lahore

Abstract:

TIME is difficult to define. The dictionary defines TIME as a 'period' and defines a 'period' as 'time. This leads us to nowhere. Time is simply how long we wait (Feynmann). Time is what prevents so many things happening all at once. Can mathematical breakthroughs establish God's extradimensional might? Was there a beginning of time? Could time run backwards? Is the Universe infinite or does it have boundaries? "A Brief History of Time" by the living legend Stephen Hawking, addresses some of these fundamental questions and with us, Muhammad Omar Saleem will share some of his private moments in the exciting voyage through space-time. He will present an outline and review of the book and tell us why reading it was so exciting. He will mention and summarise the basic concepts (such as the anthropic principle, expansion of the universe, man's role in the cosmos, unification and the ultimate nature of matter) that are already there in "A Brief History of Time". He will also read out some select portions from the book.